TL;DR: OpenIDEA is built on a Rust core and Tauri desktop framework to replicate the familiar interface of heavy Java-based IDEs without the resource overhead. It bundles an editor, code insight, debugger, Git integration, terminal, and database and HTTP clients into a single compiled binary supporting over sixty languages.
Best for: Developers who love IntelliJ keyboard shortcuts and tooling but want drastically lower memory usage and instant startup times.
Repository snapshot: ⭐ 7 315 stars · 🍴 611 forks · TypeScript · Apache-2.0
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What it is

OpenIDEA is a fast, native development environment built on TypeScript, Rust, and the Tauri framework. It replicates the interface and keymaps of heavy Java-based editors while drastically reducing resource overhead, consuming about 169 MB of memory and launching large repositories in under a second.

How it works

By leveraging a native Rust core, the application avoids the heavy memory footprint of traditional virtual machines. Plugins run securely inside sandboxed WebAssembly runtimes, while themes and language packs require no compiled code.

Key features

  • Opens large repositories in 0.9 seconds with warm caches
  • Uses 169 MB of memory compared to over 2 GB in traditional tools
  • Includes editor, code insight, debugger, Git, terminal, database, and HTTP clients
  • Supports over 60 programming languages
  • Build custom extensions using the openidea-plugin new CLI tool

Getting started

Clone the repository from l0ng-ai/openidea, ensure you have the required build tools for Tauri and Rust, and follow the setup instructions in the readme to compile and run your local instance.

When not to use it

Skip this if you rely heavily on mature, complex proprietary plugins that have no equivalent in the preview WebAssembly plugin ecosystem.

Discuss

Which IntelliJ shortcut or tool window do you miss most when using lightweight text editors?

Curated from the repository README and metadata. No hands-on test is claimed; evaluate it in a sandbox before production use.